'NNTmux', 'mail.from.address' => 'noreply@example.test', 'mail.brand.subject_prefix' => '[NNTmux] ', ]); $user = new User; $user->username = 'tester'; $mailable = new WelcomeEmail($user); $mailable->assertHasSubject('[NNTmux] Welcome to NNTmux'); $mailable->assertSeeInHtml('Welcome to NNTmux'); $mailable->assertSeeInHtml('Dear tester'); $mailable->assertDontSeeInHtml('#667eea'); $mailable->assertDontSeeInHtml('#764ba2'); $mailable->assertSeeInText('Welcome to NNTmux'); $mailable->assertSeeInText('Dear tester'); } public function test_welcome_email_implements_should_queue_via_queueable_trait(): void { $this->assertContains( Queueable::class, class_uses_recursive(WelcomeEmail::class), 'WelcomeEmail must use Queueable so SendWelcomeEmail jobs can dispatch it on a queue.' ); } }